Blog
Regulatory updates, practical guidance, and notes from the MANTIS team.
Scope, the three parts, HKC vs EU SRR, certificates, and keeping Part I current — the full picture in one place.
The Hong Kong Convention gives existing ships until their first renewal survey on or after 26 June 2025 — and no later than 26 June 2030 — to hold an IHM certificate. Here is what that deadline means and what to do now.
Read →Maintaining an IHM is meant to be owned by a named person. Here is what the IHM Designated Person does on a superyacht, and how the role works alongside the DPA, Captain and Chief Engineer.
Read →The Inventory of Hazardous Materials has three parts, each with different rules and different upkeep. Here is what Part I, Part II and Part III each cover on a superyacht, in plain language.
Read →Material Declarations and Supplier's Declarations of Conformity are the documents that keep Part I defensible. Here is what they are, when you need them, and how to stop them scattering across email.
Read →A plain-language walk-through of IHM scope for yachts — the 500 GT threshold, why gross tonnage is not length, the EU port-call trigger, and the private-versus-commercial question.
Read →A practical, vessel-side guide to what a Port State Control officer or surveyor looks at when they inspect your IHM — the documents they request, the findings that come up most, and how to be ready.
Read →Two IHM regimes, two certificates, one inventory. Here is the difference between the Hong Kong Convention's ICIHM and the EU Ship Recycling Regulation's Statement of Compliance — and how a superyacht can satisfy both.
Read →Ozone-depleting substances are controlled under both the Hong Kong Convention and MARPOL Annex VI. Here is what refrigerant servicing, recharging, and system replacement means for your IHM.
Read →The IHM renewal survey verifies that Part I has been maintained and changes are documented. Here is what to have in order before the surveyor arrives.
Read →The Hong Kong Convention applies to all vessels 500 GT and above, regardless of build year. For older vessels where original records are incomplete or missing, here is how the initial IHM survey works.
Read →A refit is when IHM compliance gets complicated. Here is what the Hong Kong Convention requires when materials change, and how to build the documentation chain that supports your next survey.
Read →The HKC entered into force in June 2025. Here is what global IHM enforcement means for superyacht DPs and Chief Engineers — and what you need to have ready for your next PSC inspection.
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